Phenol

This page summarizes the optical absorption and emission data of Phenol that
is available in the PhotochemCAD
package, version 2.1a (Du 1998, Dixon 2005). I reworked their data to
produce these interactive graphs and to provide direct links to text files
containing the raw and manipulated data. Although I have tried to be careful, I
may have introduced some errors; the cautious user is advised to compare these
results with the original sources.

The JavaScript libraries that I used to graph the data
do not work with IE7 and earlier — you will not see the cool
interactive graphs. Chrome seems to work best. You can resize
any of the graphs by clicking and dragging a rectangle. If you
hover the mouse over the graph, you will see a pop-up showing the
coordinates. One of the icons in the upper right corner will let you
export the graph in other formats.

Absorption

This optical absorption measurement of Phenol were made by
R.-C. A. Fuh in the summer of 1995 using a Cary 3.
The absorption values were collected using a spectral bandwidth of 1.0 nm, a signal averaging time of 0.133 sec, a data interval of 0.25 nm, and a scan rate of 112.5 nm/min.

These measurements were scaled to make the molar extinction coefficient match
the value of 2,340cm-1/M at 270.8nm (Berlman, 1971).

Fluorescence

The fluorescence emission spectrum of Phenol
dissolved in hexane. The excitation wavelength was 260nm.
The quantum yield of this molecule is 0.075 (Grabner, 1990).
This spectrum was collected by in the summer of 1995
using a Spex FluoroMax.
The excitation and emission monochromators were set at 1 mm, giving a spectral bandwidth of 4.25 nm. The data interval was 0.5 nm and the integration time was 2.0 sec.

Samples were prepared in 1cm pathlength quartz cells with absorbance less than 0.1 at the excitation and all emission wavelengths to uniformly illuminate across the sample, and to avoid the inner-filter effect. The dark counts were subtracted and the spectra were corrected for wavelength-dependent instrument sensitivity.